CN102743925A - Hemp composite filter material and its preparation method - Google Patents
Hemp composite filter material and its preparation method Download PDFInfo
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- CN102743925A CN102743925A CN2012101949912A CN201210194991A CN102743925A CN 102743925 A CN102743925 A CN 102743925A CN 2012101949912 A CN2012101949912 A CN 2012101949912A CN 201210194991 A CN201210194991 A CN 201210194991A CN 102743925 A CN102743925 A CN 102743925A
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Abstract
The invention discloses a hemp composite filter material and its preparation method. The method comprises the following steps: 1, mixing a hemp fiber with a viscose fiber, and then sequentially carrying out steps of opening, carding, lapping, drafting, spunlace and drying to obtain a hemp/viscose spunlaced non-woven; and 2, preparing a nanometer fiber layer on the hemp/viscose spunlaced non-woven through electrostatic spinning to obtain the hemp composite filter material. The composite filter material provided by the invention is a two-layer composite material comprising the micrometer-diameter hemp/viscous spunlaced non-woven and the nanometer-diameter fiber, wherein the hemp/viscous spunlaced non-woven has the advantages of good physical performances, good permeability, small thickness and proportion, large breaking strength and good wear resistance; and a comparison between the base cloth of the hemp/viscous spunlaced non-woven and the two-layer composite filter material disclosed in the invention in filter performance and bore diameter indicates that the two-layer composite filter material provided by the invention has a better filter effect.
Description
Technical field
The present invention relates to a kind of Chinese fiber crops composite filter material and preparation method thereof.
Background technology
In filtering material commonly used, composite is a kind of material commonly used, perhaps utilize two-layer carry out compound; Perhaps utilize three layers carry out compound, and automobile engine oil filter element commonly used with filtering material in, the Populus deltoides that has comparatively commonly used is starched filter paper, glass filter paper, polyester non-woven fabric filtering material and polypropylene nonwoven filtering material; The main filtration rank of this material is a micron order; No matter be filtering accuracy, or the aperture all is a micron level, so its filter effect is all not ideal.Simultaneously; The automobile engine oil cleaner mainly is the particulate debris that is present in dust, metallic particles and some other easy blocking filter medium in the machine oil to be filtered remove; Thereby make machine oil can get into engine system smoothly; These machine oil filtering materials commonly used owing to the obstruction of these particles damages filter medium, greatly reduces service life of oil filter, have also increased use cost through regular meeting.
Because the filtering accuracy of these filter mediums mainly is a micron level, thus can't better filter out for some littler particles, on such basis; Just consider that developing a kind of new automobile engine oil filter element uses filtering material; The unique advantage of utilizing nanofiber to have, bigger specific area, less fibre diameter and higher filtering accuracy can filter removal preferably with littler dust, metallic particles, chip; Prolonged the service life of automobile engine oil filter element with filtering material; Simultaneously, also reduce the cycle of using oil filter instead, also can reduce use cost preferably.
Summary of the invention
The purpose of this invention is to provide a kind of Chinese fiber crops composite filter material and preparation method thereof.
The preparation method of a kind of Chinese fiber crops composite filter material provided by the present invention comprises the steps:
(1) china-hemp fibers and viscose rayon are mixed, obtain Chinese fiber crops/viscose glue hydro-entangled non-woven fabric through shredding, combing, lapping, drawing-off, water thorn and drying steps successively then;
(2) on said Chinese fiber crops/viscose glue hydro-entangled non-woven fabric, prepare nanofiber layer through electrostatic spinning and promptly get said Chinese fiber crops composite filter material.
Among the above-mentioned preparation method, the average length of said china-hemp fibers can be 8mm ~ 92mm, specifically can be 27.88mm or 90mm, and fineness can be 3.35 μ m ~ 19.55 μ m, specifically can be 3.35 μ m or 14.31 μ m; The average length of said viscose rayon can be 20mm ~ 51mm, specifically can be 34.12mm or 34.06mm, and fineness can be 10.12 μ m ~ 17.92 μ m, specifically can be 11.645 μ m or 14.75 μ m.
Among the above-mentioned preparation method, the ratio of quality and the number of copies of said china-hemp fibers and viscose rayon is 4: (1 ~ 3) specifically can be 3:2 or 4:1.
Among the above-mentioned preparation method, said shredding step comprises the thick shredding step and the smart shredding step of carrying out successively.
Among the above-mentioned preparation method; Said combing step is carried out in the mixed and disorderly carding machine of two pass husband, mainly is the fiber that the shredding that obtains mixes is carded to single fiber condition, in order better to carry out lapping; Simultaneously, also be in order to form three-dimensional state, the mixed and disorderly fibre web of arranging.
Among the above-mentioned preparation method, said lapping step adopts the mode of cross lapping, and this mode can improve the operating efficiency of carding machine, increases the width of product, thereby the applicability of product is obviously improved.
Among the above-mentioned preparation method, said drafting step is carried out in 3 draw zones, and the drafting multiple in each draw zone is 2 ~ 6; As 2 or 5.1; Mainly be in order originally to be transversely arranged fibre web to vertical arrangement, and to form, thereby satisfy the powerful requirement on using preferably in length and breadth to powerful requirement.
Among the above-mentioned preparation method, said water thorn step can be carried out in the plain net spun-laced machine; Each plain net spun-laced machine can comprise 2 water jets; Said method comprises 2 road water thorn steps; In the 1st road water thorn step, the pressure of the 1st water jet is 10bar ~ 20bar, specifically can be 10bar or 15bar, and the pressure of the 2nd water jet is 65bar ~ 70bar, specifically can be 65bar or 70bar; In the 2nd road water thorn step, the pressure of the 1st water jet is 10bar ~ 20bar, specifically can be 15bar or 20bar, and the pressure of the 2nd water jet is 80bar ~ 90bar, specifically can be 80bar or 90bar.
Among the above-mentioned preparation method, the used spinning solution of said electrostatic spinning can be the aqueous solution of nylon 6 (PA6), and the quality percentage composition of said spinning solution can be 10% ~ 30%, as 18% or 22%.
Among the above-mentioned preparation method, in the said electrostatic spinning, spinning voltage can be 12 ~ 40kV, and like 28kV or 40kV, the spinning distance can be 16 ~ 39cm, and like 18cm or 39cm, the injection head flow velocity can be 0.8～1.2mL/h, like 0.8mL/h or 1.2mL/h.
Among the above-mentioned preparation method, the time of said electrostatic spinning can be 1 ~ 10h, specifically can be 3h or 10h, to obtain more uniform nanofiber layer.
The present invention also further provides the Chinese fiber crops composite filter material by method for preparing.
Composite filter material provided by the invention mainly is by the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric of micron order diameter and the fibrous a kind of two-layer composite of nanometer grade diameter; Wherein, the physical property of Chinese fiber crops/viscose glue hydro-entangled non-woven fabric is good, and gas permeability is also better, thickness and quantitatively less, and ultimate strength is bigger, and wearability is also better; The strainability and the aperture of Chinese fiber crops/viscose glue hydro-entangled non-woven fabric base cloth and two-layer compound filtering material of the present invention are compared and can find, two-layer compound filtering material provided by the invention has filter effect preferably.
Description of drawings
Fig. 1 is 50 times of photos of ESEM of Chinese fiber crops/viscose glue hydro-entangled non-woven fabric base cloth of preparing in the embodiment of the invention.
Fig. 2 is 1000 times of photos of ESEM of the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric base cloth of preparation in the embodiment of the invention 1.
Fig. 3 spins 2000 times of photos of ESEM of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 1 preparation.
Fig. 4 spins 5000 times of photos of ESEM of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 1 preparation.
Fig. 5 spins 20000 times of photos of ESEM of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 1 preparation.
Fig. 6 spins 50000 times of photos of ESEM of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 1 preparation.
Fig. 7 spins the graph of a relation of the distribution of fiber diameters and the frequency of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 1 preparation.
Fig. 8 spins 50000 times of photos of ESEM of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 2 preparations.
Fig. 9 spins the graph of a relation of the distribution of fiber diameters and the frequency of PA6 nanofiber for the high-pressure solution of the embodiment of the invention 2 preparations.
Figure 10 is the infrared spectrogram of the non-weaving cloth and the Chinese fiber crops composite filter material of preparation in the used china-hemp fibers of the present invention, viscose rayon and the embodiment 1.
Figure 11 is the cross section characteristic of the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric of preparation in the embodiment of the invention 1.
Figure 12 is the two-layer characteristic of the Chinese fiber crops/viscose glue spunlace non-woven fabricbase electrostatic spinning nano fiber composite filter material of the embodiment of the invention 1 preparation.
Figure 13 is the nanometer layer characteristic of the Chinese fiber crops/viscose glue spunlace non-woven fabricbase electrostatic spinning nano fiber composite filter material of the embodiment of the invention 1 preparation.
The specific embodiment
Employed experimental technique is conventional method like no specified otherwise among the following embodiment.
Used material, reagent etc. like no specified otherwise, all can obtain from commercial sources among the following embodiment.
China-hemp fibers used among the following embodiment is available from the holding Co., Ltd of Chinese fiber crops industrial investment; Used viscose rayon is available from Shandong Hua Le group.
(1) knit preceding preparation: select china-hemp fibers and viscose rayon for use, the china-hemp fibers average length is 27.88mm, and the viscose rayon average length is 34.12mm; The china-hemp fibers average fineness is 14.31 μ m; The viscose rayon average fineness is 14.75 μ m, and china-hemp fibers was 6KG when sample was produced, and viscose glue is 4KG; So blending ratio is 3:2, initially quantitatively be predefined for 150g/m
2
(2) opening picking: at first china-hemp fibers and viscose rayon are carried out artificial shredding, respectively the fiber package that the bag shape is arranged in china-hemp fibers and the viscose rayon is torn apart with hand earlier, tear evenly as far as possible and accomplish not damage fiber; Because the color of china-hemp fibers is light yellow; Find that impurity wherein is less, do not have basically that feel is also soft; And the impurity of viscose rayon is more; Process discovery in manual shredding wherein has branches and leaves, cottonseed, impurity such as broken seed, fiber mote and hard goods, need get rid of timely, guarantees into all even non-weaving cloth preferably of quality of net; After removing impurity, can mix, manual earlier the mixing, mix as far as possible, this mainly carries out artificial shredding in the cotton storage tank of a rectangle that has defeated lace curtaining, in the shredding process, need dewing, in order to prevent to produce static and flyings; Mixed fiber is added in the thick opener mixes, and make and do not have that the big cotton-wool of shredding and fiber block dissociates, mix, abundant shredding by hand; Fiber through after the thick shredding begins to get into big storehouse cotton blender machine, and the capacity of Chu Miancang is bigger, mainly is to utilize the wind of blower fan that fiber is carried out the shredding second time; Next fiber begins to get into refined opener, mainly is fiber is compared meticulous shredding, and the fiber opening of preparatory shredding is become fubril shape or bundle fiber shape, for the combing processing of back and become net ready.
(3) combing: utilize constant volume type air pressure feed cotton machine will the above-mentioned composite fibre that obtains evenly, stablize to such an extent that be sent in the mixed and disorderly carding machine of two pass husband and carry out combing; Adopting the mixed and disorderly roller of two pass husband to carry out combing, mainly is that the fiber that front operation shredding mixes is carded to single fiber condition, in order better to carry out the staggered form lapping, simultaneously, also is in order to form three-dimensional state, the mixed and disorderly fibre web of arranging.
(4) become net: the mode that adopts cross lapping;
The control that fibre web is quantitative: in becoming network process, that just begun to expect quantitatively is 150g/m
2, in just beginning the lapping process, through each fibre web of weighing quantitatively is 9g/m
2So the lapping number of plies that adopts is 15, so the quantitative of 15 fibre webs is 135g/m at this moment
2, the back quantitatively can increase in the water thorn process again, so adopt 15 lapping numbers of plies.
(5) drawing-off: adopt three cylinders, form three draw zones, the drafting multiple of each draw zone is 5.1, mainly is in order originally to be transversely arranged fibre web to vertical arrangement, and to form preferably in length and breadth to powerful requirement, thereby satisfies the powerful requirement on using.
(6) water thorn: adopt the flat screen type spun-laced machine, comprise two water jets; Adopt the twice water jet process, wherein, in the 1st road water jet process, the pressure of the 1st water jet is 15bar, and the pressure of the 2nd water jet is 70bar; In the 2nd road water jet process, the pressure of the 1st water jet is 15bar, and the pressure of the 2nd water jet is 90bar.
(7) drying: owing in the water thorn process, the existence of large quantity of moisture is arranged, so need carry out drying, remove redundant moisture, make material conveniently to use, satisfy instructions for use, wherein the dry temperature of control is 20 ℃.
50 times of photos of ESEM of the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric of above-mentioned steps preparation are as shown in Figure 1, and 1000 times of photos of its ESEM are as shown in Figure 2; The cross section characteristic of this Chinese fiber crops/viscose glue hydro-entangled non-woven fabric is shown in figure 11.
The properties of product test:
The main performance of the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric of this above-mentioned preparation is: thickness: 1.173mm, quantitatively: 152.73g/m
2, air penetrability: 88.5864mm/s, its longitudinally physical performance index be: ultimate strength: 247.52N; Extension at break: 65.663mm, elongation at break: 328.319%, rupture time: 39.397S; Disconnected brute force: the 96.62N that takes off; The disconnected percentage elongation that takes off: 344.589%, disconnected elongation: the 68.917mm, work to break: 8.912J of taking off; Horizontal physical performance index is: ultimate strength: 152.65N, extension at break: 103.629mm, elongation at break: 518.149%; Rupture time: 62.177s, disconnected brute force: the 60.274N that takes off, the disconnected percentage elongation that takes off: 542.699%; Disconnected elongation: the 108.539mm, work to break: 8.067J of taking off.
Test process and result are following:
(1) thickness measuring,
Tester: the digital fabric thickness appearance of YG141N type
Unit is mm, and ballast is 100g, and test result is as shown in table 1.
The thickness measuring result of table 1 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
(2) quantitative test
Tester: electronic balance, unit are g/m
2, test result is as shown in table 2.
The quantitative test result of table 2 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
(3) air penetrability test
The computermatic air permeability tester of tester: YG461E, unit are mm/s,
Test condition: sample pressure reduction is 100Pa, 3# nozzle, sample area 20cm
2, test result is as shown in table 3.
The air penetrability test result of table 3 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
(4) powerful and elongation test
Tester: YG065 strength tester, the test of galley proof method
Test condition: specimen length 20mm, draw speed 100mm/min, pre-tension 100cN.It vertically reaches horizontal physical property test result shown in table 4, table 5, and it is vertical, the rational comparative result of transverses is as shown in table 6.
Vertical physical property test result of table 4 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
The horizontal physical property test result of table 5 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
Vertical, the rational comparative result of transverses of table 6 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
(8) the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric with above-mentioned preparation is prepared to the specimen size of required size, and is laid on the base plate of monolithic metal, and in this process, the base plate of earthing power supply and monolithic metal joins, and forms a loop.
(9) preparation spinning solution: the quality percentage composition is 22% the PA6 aqueous solution.
(3) PA6 solution is sucked in the injection needle, and the distance of adjusting between base plate and the injection needle is 18cm, guarantees that spun silk can be collected on the Chinese fiber crops/viscose glue hydro-entangled non-woven fabric of base plate, will guarantee simultaneously that static spins nanometer layer can be even; Open high voltage source, the control spinning voltage is 28kV, and the injection head flow velocity is 1.2mL/h, and the spinning time is 3h, obtains the uniform two-layer composite filter material of nanometer layer.
2000 times of photos of ESEM of the composite filter material of this embodiment preparation are as shown in Figure 3; 5000 times of photos of its ESEM are as shown in Figure 4; 20000 times of photos of its ESEM are as shown in Figure 5; 50000 times of photos of its ESEM are as shown in Figure 6, and the graph of a relation of its distribution of fiber diameters and frequency is as shown in Figure 7.
The two-layer characteristic of the Chinese fiber crops/viscose glue spunlace non-woven fabricbase electrostatic spinning nano fiber composite filter material of this embodiment preparation is shown in figure 12, and its nanometer layer characteristic is shown in figure 13.
The infrared spectrogram of the non-weaving cloth of the used china-hemp fibers of this embodiment, viscose rayon and preparation thereof and Chinese fiber crops composite filter material is shown in figure 10.
The composite filter material of present embodiment preparation is carried out performance test, and its test result is respectively shown in table 7 and table 8.As shown in table 7, the maximum gauge of this electrostatic spinning nano fiber is 128.11nm, and minimum diameter is 58.19nm, and average diameter is 97.70nm.Table 8 is the aperture and the filtering accuracy test result of Chinese fiber crops/viscose glue hydro-entangled non-woven fabric and electrostatic spinning nano fiber composite filter material.
Table 7 electrostatic spinning nano fiber diameter test result
The strainability of table 8 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric and nano composite material relatively
Embodiment 2, preparation china-hemp fibers composite filter material
(1) in the step of preparation Chinese fiber crops/viscose glue hydro-entangled non-woven fabric, all identical among this preparation technology and the embodiment 1, difference is: the average length of viscose rayon is 34.06mm, and fineness is 11.645 μ m; The average length of china-hemp fibers is 90mm, and fineness is 3.35 μ m; The ratio of quality and the number of copies of china-hemp fibers and viscose rayon is 4:1; Drafting step is carried out in 3 draw zones, and the drafting multiple in each draw zone is 2; In the water thorn step, adopt the twice water jet process, wherein, in the 1st road water jet process, the pressure of the 1st water jet is 10bar, and the pressure of the 2nd water jet is 65bar; In the 2nd road water jet process, the pressure of the 1st water jet is 20bar, and the pressure of the 2nd water jet is 80bar.
Chinese fiber crops/viscose glue the hydro-entangled non-woven fabric of preparation, its performance of products such as following table 9 ~ table 14, the method for testing of each performance and testing equipment are with identical among the embodiment 1.
The thickness measuring result of table 9 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
The quantitative test result of table 10 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
The air penetrability test result of table 11 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
Vertical physical property test result of table 12 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
The horizontal physical property test result of table 13 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric
The portraitlandscape physical property of table 14 Chinese fiber crops/viscose glue hydro-entangled non-woven fabric relatively
(2) on above-mentioned Chinese fiber crops/viscose glue hydro-entangled non-woven fabric, prepare nanofiber layer; Wherein the technology of electrostatic spinning is following: spinning solution also is the PA6 aqueous solution; Its quality percentage composition is 18%, and the spinning distance is 39cm, and the injection needle flow velocity is 0.8mL/h; Spinning voltage is 40kV, and the spinning time is 10h; The Chinese fiber crops that prepare/viscose glue spunlace non-woven fabricbase electrostatic spinning nano fiber composite filter material.
50000 times of photos of ESEM of the Chinese fiber crops/viscose glue spunlace non-woven fabricbase electrostatic spinning nano fiber composite filter material of this embodiment preparation are as shown in Figure 8; The relation of this electrostatic spinning nano fiber composite filter material diameter Distribution and frequency is as shown in Figure 9; The fibre diameter test result is as shown in Tble 15, and aperture and filtering accuracy test result are shown in table 16.
The electrostatic spinning nano fiber diameter test result of table 15 embodiment 2 preparations
The aperture and the filtering accuracy test result of the Chinese fiber crops composite filter material of table 16 embodiment 2 preparations
Claims (9)
1. the preparation method of a Chinese fiber crops composite filter material comprises the steps:
(1) china-hemp fibers and viscose rayon are mixed, obtain Chinese fiber crops/viscose glue hydro-entangled non-woven fabric through shredding, combing, lapping, drawing-off, water thorn and drying steps successively then;
(2) on said Chinese fiber crops/viscose glue hydro-entangled non-woven fabric, prepare nanofiber layer through electrostatic spinning and promptly get said Chinese fiber crops composite filter material.
2. preparation method according to claim 1 is characterized in that: the average length of said china-hemp fibers is 8mm ~ 92mm, and fineness is 3.35 μ m ~ 19.55 μ m; The average length of said viscose rayon is 20mm ~ 51mm, and fineness is 10.12 μ m ~ 17.92 μ m.
3. preparation method according to claim 1 and 2 is characterized in that: the ratio of quality and the number of copies of said china-hemp fibers and viscose rayon is 4: (1 ~ 3).
4. according to arbitrary described preparation method among the claim 1-3, it is characterized in that: said shredding step comprises the thick shredding step and the smart shredding step of carrying out successively.
5. according to arbitrary described preparation method among the claim 1-4, it is characterized in that: said combing step is carried out in the mixed and disorderly carding machine of two pass husband; Said lapping step adopts the mode of cross lapping; Said drafting step is carried out in 3 draw zones, and the drafting multiple in each draw zone is 2 ~ 6.
6. according to arbitrary described preparation method among the claim 1-5, it is characterized in that: said water thorn step is carried out in the plain net spun-laced machine; Each plain net spun-laced machine comprises 2 water jets; Said method comprises 2 road water thorn steps; In the 1st road water thorn step, the pressure of the 1st water jet is 10bar ~ 20bar, and the pressure of the 2nd water jet is 65bar ~ 70bar; In the 2nd road water thorn step, the pressure of the 1st water jet is 10bar ~ 20bar, and the pressure of the 2nd water jet is 80bar ~ 90bar.
7. according to arbitrary described preparation method among the claim 1-6, it is characterized in that: the used spinning solution of said electrostatic spinning is nylon 6 aqueous solution, and the quality percentage composition of said spinning solution is 10% ~ 30%.
8. according to arbitrary described preparation method among the claim 1-7, it is characterized in that: in the said electrostatic spinning, spinning voltage is 12 ~ 40kV, and the spinning distance is 16 ~ 39cm, and the injection head flow velocity is 0.8～1.2mL/h, and the spinning time is 1 ~ 10h.
9. the Chinese fiber crops composite filter material that arbitrary said method prepares among the claim 1-8.
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Cited By (11)
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| CN102908829A (en) * | 2012-11-20 | 2013-02-06 | 天津工业大学 | Cellulose sodium/micron-cellulose non-woven composite filter material and preparation method thereof |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN103706187A (en) * | 2013-11-25 | 2014-04-09 | 盐城工学院 | Manufacturing method for printing and dyeing wastewater filter material |
| CN104436865A (en) * | 2014-03-24 | 2015-03-25 | 福建省贝思达环保投资有限公司 | High-efficiency low-resistance PM2.5 composite fiber filtering membrane and electrostatic spinning preparation method |
| CN105821493A (en) * | 2015-01-27 | 2016-08-03 | 粘誉薰 | Method for preparing composite nanofiber, composite nanofiber prepared by method, filter layer body and mask with filter layer body |
| CN106676752A (en) * | 2016-08-25 | 2017-05-17 | 仇颖超 | Preparation method of low-resistance composite air filter material |
| CN108004628A (en) * | 2018-01-05 | 2018-05-08 | 东华大学 | It is a kind of to be used to prepare the device and method of nanofiber/staple blended yarn with the nanofiber mechanism that prevents adhesion |
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| CN110090492A (en) * | 2019-04-15 | 2019-08-06 | 嘉兴职业技术学院 | The preparation method of gradient pore structured SS/PVA composite Nano filtrate |
| CN112779669A (en) * | 2020-12-29 | 2021-05-11 | 宜昌市欣龙卫生材料有限公司 | China-hemp blended non-woven fabric and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102908829A (en) * | 2012-11-20 | 2013-02-06 | 天津工业大学 | Cellulose sodium/micron-cellulose non-woven composite filter material and preparation method thereof |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN103706187A (en) * | 2013-11-25 | 2014-04-09 | 盐城工学院 | Manufacturing method for printing and dyeing wastewater filter material |
| CN103706187B (en) * | 2013-11-25 | 2015-11-25 | 盐城工学院 | The manufacture method of dyeing waste water filtering material |
| CN104436865A (en) * | 2014-03-24 | 2015-03-25 | 福建省贝思达环保投资有限公司 | High-efficiency low-resistance PM2.5 composite fiber filtering membrane and electrostatic spinning preparation method |
| CN105821493A (en) * | 2015-01-27 | 2016-08-03 | 粘誉薰 | Method for preparing composite nanofiber, composite nanofiber prepared by method, filter layer body and mask with filter layer body |
| CN106676752A (en) * | 2016-08-25 | 2017-05-17 | 仇颖超 | Preparation method of low-resistance composite air filter material |
| CN108004628A (en) * | 2018-01-05 | 2018-05-08 | 东华大学 | It is a kind of to be used to prepare the device and method of nanofiber/staple blended yarn with the nanofiber mechanism that prevents adhesion |
| CN108035027A (en) * | 2018-01-05 | 2018-05-15 | 东华大学 | A kind of compound short fibre web mass of electrostatic spinning nano fiber prepares the device and method of mixed yarn |
| CN108035027B (en) * | 2018-01-05 | 2020-12-18 | 东华大学 | Device and method for preparing blended yarns in batch by using electrostatic spinning nanofiber composite short fiber nets |
| CN110090492A (en) * | 2019-04-15 | 2019-08-06 | 嘉兴职业技术学院 | The preparation method of gradient pore structured SS/PVA composite Nano filtrate |
| CN112779669A (en) * | 2020-12-29 | 2021-05-11 | 宜昌市欣龙卫生材料有限公司 | China-hemp blended non-woven fabric and preparation method thereof |
| CN113463278A (en) * | 2021-07-21 | 2021-10-01 | 内蒙古工业大学 | Nano/micron composite fiber membrane and preparation method thereof |
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